package com.wxw.BaseLibrary.tool;

//import android.util.Base64;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import java.security.Key;

/**
 * Created by david on 2016/3/31.
 */
public class DES3 {
    //key为abcdefghijklmnopqrstuvwx的Base64编码
    public static byte[] SECURITY_KEY= Base64.decode("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4");
    public static byte[] SECURITY_IV = { 1, 2, 3, 4, 5, 6, 7, 8 };

    /**
     * ECB加密,不要IV
     * @param key 密钥
     * @param data 明文
     * @return Base64编码的密文
     * @throws Exception
     */
    public static byte[] des3EncodeECB(byte[] key, byte[] data)
            throws Exception {

        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);

        Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");

        cipher.init(Cipher.ENCRYPT_MODE, deskey);
        byte[] bOut = cipher.doFinal(data);

        return bOut;
    }

    /**
     * ECB解密
     * @param data 明文
     * @return 密文
     * @throws Exception
     */
    public static String des3EncodeECB(String data)
            throws Exception {
        byte[] sdata = des3EncodeECB(SECURITY_KEY, data.getBytes("UTF-8"));
        //return Base64.encodeToString(sdata, 0);
        return Base64.encode(sdata);
    }

    /**
     * ECB解密,不要IV
     * @param key 密钥
     * @param data Base64编码的密文
     * @return 明文
     * @throws Exception
     */
    public static byte[] des3DecodeECB(byte[] key, byte[] data)
            throws Exception {

        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);

        Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");

        cipher.init(Cipher.DECRYPT_MODE, deskey);

        byte[] bOut = cipher.doFinal(data);

        return bOut;

    }

    /**
     * ECB解密
     * @param sdata 密文
     * @return 明文
     * @throws Exception
     */
    public static String des3DecodeECB(String sdata)
            throws Exception{
        byte[] data = des3DecodeECB(SECURITY_KEY, Base64.decode(sdata));
        return new String(data, "UTF-8");
    }

    /**
     * CBC加密
     * @param key 密钥
     * @param keyiv IV
     * @param data 明文
     * @return Base64编码的密文
     * @throws Exception
     */
    public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data)
            throws Exception {

        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);

        Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(keyiv);
        cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
        byte[] bOut = cipher.doFinal(data);

        return bOut;
    }

    /**
     * CBC加密
     * @param data 明文
     * @return 密文
     * @throws Exception
     */
    public static String des3EncodeCBC(String data)
            throws Exception {
        byte[] sdata = des3EncodeCBC(SECURITY_KEY, SECURITY_IV, data.getBytes("UTF-8"));
        return Base64.encode(sdata);
    }

    /**
     * CBC解密
     * @param key 密钥
     * @param keyiv IV
     * @param data Base64编码的密文
     * @return 明文
     * @throws Exception
     */
    public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data)
            throws Exception {

        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);

        Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(keyiv);

        cipher.init(Cipher.DECRYPT_MODE, deskey, ips);

        byte[] bOut = cipher.doFinal(data);

        return bOut;

    }

    /**
     * CBC解密
     * @param sdata 密文
     * @return 明文
     * @throws Exception
     */
    public static String des3DecodeCBC(String sdata)
            throws Exception{
        byte[] data = des3DecodeCBC(SECURITY_KEY, SECURITY_IV, Base64.decode(sdata));
        return new String(data, "UTF-8");
    }


    /*
       byte[] key=Base64.decode("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4".getBytes(),Base64.DEFAULT);
        byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };

        byte[] data="中国ABCabc123".getBytes("UTF-8");

        System.out.println("ECB加密解密");
        byte[] str3 = des3EncodeECB(key,data );
        byte[] str4 = ees3DecodeECB(key, str3);
        System.out.println(new String(Base64.encode(str3,  Base64.DEFAULT),"UTF-8"));
        System.out.println(new String(str4, "UTF-8"));

        System.out.println();

        System.out.println("CBC加密解密");
        byte[] str5 = des3EncodeCBC(key, keyiv, data);
        byte[] str6 = des3DecodeCBC(key, keyiv, str5);
        System.out.println(new String(Base64.encode(str5,  Base64.DEFAULT),"UTF-8"));
        System.out.println(new String(str6, "UTF-8"));

     */
}
